Complete NixOS rewrite: Transform Omarchy from Arch to declarative NixOS

- Replace shell script-based Arch installation with declarative NixOS configuration
- Implement flake-based architecture for reproducible builds
- Add modular system with feature flags (Docker, gaming, development, etc.)
- Create declarative theme system with Tokyo Night and Catppuccin
- Convert utility scripts to Nix packages with proper derivations
- Add comprehensive development environments (Rust, Go, Python, Node.js, C/C++)
- Implement Home Manager integration for user environment management
- Add interactive installer with theme selection and feature configuration
- Update documentation for NixOS-specific workflows and commands
- Provide atomic updates with rollback capability

This maintains all aesthetic and functional benefits of original Omarchy
while gaining NixOS power: reproducibility, version control, and atomic updates.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

modules/hardware/default.nix

@@ -0,0 +1,170 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  imports = [
+    ./nvidia.nix
+    ./amd.nix
+    ./intel.nix
+    ./audio.nix
+    ./bluetooth.nix
+    ./touchpad.nix
+  ];
+
+  # Common hardware support
+  hardware = {
+    # Enable all firmware
+    enableAllFirmware = true;
+    enableRedistributableFirmware = true;
+
+    # CPU microcode updates
+    cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+    cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+
+    # OpenGL/Graphics
+    opengl = {
+      enable = true;
+      driSupport = true;
+      driSupport32Bit = true;
+
+      # Common OpenGL packages
+      extraPackages = with pkgs; [
+        intel-media-driver # Intel VAAPI
+        vaapiIntel
+        vaapiVdpau
+        libvdpau-va-gl
+        intel-compute-runtime # Intel OpenCL
+      ];
+
+      extraPackages32 = with pkgs.pkgsi686Linux; [
+        vaapiIntel
+        vaapiVdpau
+        libvdpau-va-gl
+      ];
+    };
+
+    # USB support
+    usb-modeswitch.enable = true;
+
+    # Sensor support (for laptops)
+    sensor.iio.enable = true;
+
+    # Firmware updater
+    fwupd.enable = true;
+  };
+
+  # Kernel modules
+  boot.kernelModules = [
+    # Virtualization
+    "kvm-intel"
+    "kvm-amd"
+
+    # USB
+    "usbhid"
+
+    # Network
+    "iwlwifi"
+  ];
+
+  # Power management
+  powerManagement = {
+    enable = true;
+    cpuFreqGovernor = lib.mkDefault "powersave";
+  };
+
+  services = {
+    # Thermal management
+    thermald.enable = mkDefault true;
+
+    # Power profiles daemon (modern power management)
+    power-profiles-daemon.enable = true;
+
+    # Firmware update service
+    fwupd.enable = true;
+
+    # Hardware monitoring
+    smartd = {
+      enable = true;
+      autodetect = true;
+    };
+
+    # Automatic CPU frequency scaling
+    auto-cpufreq = {
+      enable = false; # Disabled by default, conflicts with power-profiles-daemon
+      settings = {
+        battery = {
+          governor = "powersave";
+          turbo = "never";
+        };
+        charger = {
+          governor = "performance";
+          turbo = "auto";
+        };
+      };
+    };
+  };
+
+  # Additional hardware-specific packages
+  environment.systemPackages = with pkgs; [
+    # Hardware info
+    lshw
+    hwinfo
+    inxi
+    dmidecode
+    lscpu
+    lsusb
+    lspci
+    pciutils
+    usbutils
+
+    # Disk tools
+    smartmontools
+    hdparm
+    nvme-cli
+
+    # CPU tools
+    cpufrequtils
+    cpupower-gui
+
+    # GPU tools
+    glxinfo
+    vulkan-tools
+
+    # Sensors
+    lm_sensors
+
+    # Power management
+    powertop
+    acpi
+
+    # Benchmarking
+    stress
+    stress-ng
+    s-tui
+  ];
+
+  # Udev rules for hardware
+  services.udev = {
+    enable = true;
+
+    extraRules = ''
+      # Allow users in wheel group to control backlight
+      ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="*", GROUP="wheel", MODE="0664"
+
+      # Allow users in wheel group to control LEDs
+      ACTION=="add", SUBSYSTEM=="leds", KERNEL=="*", GROUP="wheel", MODE="0664"
+
+      # Gaming controllers
+      SUBSYSTEM=="usb", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="028e", GROUP="wheel", MODE="0664"
+      SUBSYSTEM=="usb", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="028f", GROUP="wheel", MODE="0664"
+    '';
+  };
+
+  # Virtual console configuration
+  console = {
+    earlySetup = true;
+    font = "${pkgs.terminus_font}/share/consolefonts/ter-132n.psf.gz";
+    packages = [ pkgs.terminus_font ];
+  };
+}